Actually Chuck/ProvaMo has found #4745 for sale at Classic Car Auctions in the Netherlands, and has questions about it's authenticity and their claims made without any supporting documentation, and I'm curious because my Dec. 1972 build "L" is #4744.
https://www.classiccar-auction...ctory-test-car-1974/
It was in Nevada in '09 - Rocky/Chuck/Ward/ anybody from your area have any more info about it from back then?